AVIF support

Hi, do you have plans to add AVIF support in the pipeline?

Yes, but for now I will wait until Qt adds support for it.

For all users who want to try AVIF right now, you can just install github.com/novomesk/qt-avif-image-plugin , it is easy to compile on Linux, so YACReader and all Qt apps that use image plugins will just work. There is also .dll for Windows in releases but I didn't try that (not sure if it is statically compiled).

The results are impressive, for example, the 75M file is down to 30M, without any difference in image quality. If I resize the comic to 1280, which I usually do, it is down to 15M! The only downside is that it is painfully slow to encode to AVIF. I used my converter here github.com/gen2brain/cbconvert to convert some comics. I plan to do that for my whole collection.

I'm not sure AVIF deserves so much interest. I've been testing it against JXL and this is waaaaaaaay better!

Give it a try, @gen2brain.

Thanks, I will try. For some reason, I thought JPEG XL is JXR, but it seems JXL and JXR are different formats, I had no idea. From the articles, I could find AVIF produced smaller files than JXL so I didn't bother. There is also a Qt plugin from the same author here github.com/novomesk/qt-jpegxl-image-plugin , for JXL.

The problem is I don't see any support, not even a library in my distro, there is no Qt plugin, bindings for Go etc. AVIF I can use right now.

Oh, JXL is great. In my tests, I've got smaller sizes using JXL.

I've recently discovered this format and have been running compression tests. and I wholeheartedly endorse this format, the quality/size ratios are ridiculous.

Sadly, AVIF is slow to compress, RAM intensive to open and errors on conversions are common.

I just made some tests using a folder with 361 files, mostly of them black and white and a lot of them painted, and found interesting results.

	original JPG	AVIF	JXL - transcoded	JXL - recompressed
plain files	674 MB	188 MB	413 MB	243 MB
zip	653 MB	188 MB	413 MB	243 MB
rar	648 MB	188 MB	413 MB	243 MB
7z	642 MB	188 MB	413 MB	243 MB

For AVIF, it's format 444, at speed 5 and quantization for color and alpha on 63.

For JXL, there's

• a version just transcoded, no recompression, to make an original file and the JXL version look exactly the same
• a version with quality 80 and compression 7

I used the default settings on XnConvert, instead of looking to match their quality between different files. I could try to fine tune the JXL options to match or improve the quality and size compared to AVIF, but it would required some time. Given that, I think to transcode JPEG to JXL is the safest option: you free a lot of MB and lose no quality or time testing configurations file by file or battery charge decompressing AVIF.

It looks like the "industry" has decided to deprecate JXL www.phoronix.com/news/Chrome-Deprecating-JPEG-XL in favor of AVIF. Without support from major players, JXL can end up the same as JPEG 2000.